> I suspect if the concept of the registry was created today it would look more like a database (e.g. Sqlite), although organizing it like a virtual FileSystem

> I suspect if the concept of the registry was created today it would look more like a database (e.g. Sqlite), although organizing it like a virtual FileSystem does have a certain appeal, and unfortunately I don't know of a database engine that supports such a layout. I think you might mean relational database. IIRC, the registry is already a database, just not a relational one.